class People {
    float hello(int a, int b) {
	return a+b;
    }
    float hello(long a, int b) {
	return a-b;
    }
    double hello(double a, int b) {
	return a*b;
    }
}
public class Example4_12 {
    public static void main(String args[]) {
	People tom = new People();
	System.out.println(tom.hello(10,20));
	Sysyem.out.println(tom.hello(10L,20));
	System.out.println(tom.hello(10.0,20));
    }
}

